Electrical Safety Related Work Pratices.ppt

Electrical Safety

1. ELECTRICAL
SAFETY-RELATED
WORK PRACTICES

2. Qualified Persons
Those people that
have training in
avoiding electrical
hazards while
working on or near
exposed energized
parts.

3. Unqualified Persons
Those people with
little or no training
in avoiding
electrical hazards
while working on
or near exposed
energized parts

4. Additional Training for
Qualified Persons
The skills and techniques necessary to distinguish
exposed live parts from other parts of electrical
equipment
The skills and techniques necessary to determine the
nominal voltage of exposed live parts
The clearance distance specified in 1910.333(c) and
the corresponding voltages to which the qualified
person will be exposed

5. Approach Distances 1910.333(C)
Voltage range (phase to phase)Minimum approach distance
300V and less ...........................Avoid Contact
Over 300V, not over 750V ........1 ft. 0 in. (30.5 cm).
Over 750V, not over 2kV ..........1 ft. 6 in. (46 cm).
Over 2kV, not over 15kV ...........2 ft. 0 in. (61 cm).
Over 15kV, not over 37kV .........3 ft. 0 in. (91 cm).
Over 37kV, not over 87.5kV ......3 ft. 6 in. (107 cm).
Over 87.5kV, not over 121kV ....4 ft. 0 in. (122 cm).
Over 121kV, not over 140kV .....4 ft. 6 in. (137 cm).

6. Types of Training
Section 1910.332 requires
that instruction utilize either
a classroom lecture or on-
the-job training strategy. The
degree of training provided is
determined by the amount of
risk to the employee

7. Safety Related Work Practices to
which the Standard Does Not Apply
Generation, transmission and distribution
installations
Communications installations
Installations in vehicles (i.e., ships, watercraft,
railway, aircraft or automotive vehicles)
Railway installations
Less than 50 volts to ground
If de-energized, all Lockout/Tagout procedures
apply

8. Employer Responsibilities
Safety related work practices to prevent
electrical shock
A written maintained copy of the procedures
outlined in paragraph (b)(2) - Lockout and
tagging written program
Proper equipment for working around or near
energized parts:
Portable ladders, non-conductive siderails

9. Employer Responsibilities
(continued)
Method to prevent any conductive materials or
equipment from making contact with live electrical
Method of making conductive apparel, such as
jewelry, non-conductive
Clothing such as wool, cotton or better
Cleaning materials such as steel wool and
conductive liquids from coming into contact with
live electrical

10. Employer Responsibilities
(continued)
A visual inspection of all flexible cord sets
(extension cords) and portable cord and plug
connected equipment
Proper illumination in confined or enclosed
work spaces
Providing appropriate insulated tools
Tools must be tested annually

11. Personal Protective
Equipment
Hard Hat - Type ‘B’
Rubber Gloves
ASTM Label on Glove
Testing and Maintaining Gloves
If possible damage to rubber glove, then
protective outer glove (leather glove)
Note: Leather gloves alone are not recommended.

12. Personal Protective
Equipment
Class Of Gloves:
(1) 10,000 Volts - Type 1
(2) 20,000 Volts - Type 2
(3) 30,000 Volts - Type 3
(4) 40,000 Volts - Type 4
(5) 1,000 Volts - Type 0 *
(6) 500 Volts - Type 00 *
* (leather glove required over the top)

13. Personal Protective
Equipment
Face Shield or Safety Glasses
Flying particles
Face Shield - electric arcs, flashes
resulting from electrical explosion.

14. Protective Tools &
Equipment
1. Insulated tools, handling equipment
If equipment comes into contact
with energized parts.
2. Protective shields, Barriers,
Insulating materials.

15. Alerting Techniques
Signs
Symbols
Tags
Barricades
Attendants

16. Preventing Shock
Safety Planning before Starting the
Work
–Determine location of work
–Determine voltage
–Determine Fire - Explosion Hazard

17. Preventing Shock
Personal Qualification
–Have you received the necessary training
to do the job?
–Do you feel good about the work
assignment?
–Are you familiar with the equipment?

18. Preventing Shock
Personal Qualification (continued)
–Do you understand exactly how to get the
job done safely?
–Do you have all the necessary parts, tools
and PPE?
–Have you studied the work to be done and
thought it through?
–Can you deenergize?

19. Preventing Shock
Never take the work of another employee.
Is the lockout labeled correctly?
Were the prints and drawing correct?
Can I guard the electrical parts?
Have I checked and tested my PPE?
Is my PPE the correct type for the work?